1205171 has 6 divisors (see below), whose sum is σ = 1318716. Its totient is φ = 1092300.

The previous prime is 1205159. The next prime is 1205173. The reversal of 1205171 is 1715021.

It is not a de Polignac number, because 1205171 - 2¹⁴ = 1188787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1205173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3476 + ... + 3806.

It is an arithmetic number, because the mean of its divisors is an integer number (219786).

2^1205171 is an apocalyptic number.

1205171 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1205171 is a deficient number, since it is larger than the sum of its proper divisors (113545).

1205171 is an frugal number, since it uses more digits than its factorization.

1205171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 1205171 is about 1097.8028056076. The cubic root of 1205171 is about 106.4182772887.

The spelling of 1205171 in words is "one million, two hundred five thousand, one hundred seventy-one".